Patch "dmaengine: zynqmp_dma: Fix race condition in the probe" has been added to the 4.9-stable tree

Patch "dmaengine: zynqmp_dma: Fix race condition in the probe" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    dmaengine: zynqmp_dma: Fix race condition in the probe

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     dmaengine-zynqmp_dma-fix-race-condition-in-the-probe.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Mar 22 14:40:24 CET 2018
From: Kedareswara rao Appana <appana.durga.rao@xilinx.com>
Date: Thu, 7 Dec 2017 10:54:28 +0530
Subject: dmaengine: zynqmp_dma: Fix race condition in the probe

From: Kedareswara rao Appana <appana.durga.rao@xilinx.com>


[ Upstream commit 5ba080aada5e739165e0f38d5cc3b04c82b323c8 ]

Incase of interrupt property is not present,
Driver is trying to free an invalid irq,
This patch fixes it by adding a check before freeing the irq.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/dma/xilinx/zynqmp_dma.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/dma/xilinx/zynqmp_dma.c
+++ b/drivers/dma/xilinx/zynqmp_dma.c
@@ -933,7 +933,8 @@ static void zynqmp_dma_chan_remove(struc
 	if (!chan)
 		return;
 
-	devm_free_irq(chan->zdev->dev, chan->irq, chan);
+	if (chan->irq)
+		devm_free_irq(chan->zdev->dev, chan->irq, chan);
 	tasklet_kill(&chan->tasklet);
 	list_del(&chan->common.device_node);
 	clk_disable_unprepare(chan->clk_apb);


Patches currently in stable-queue which might be from appana.durga.rao@xilinx.com are

queue-4.9/dmaengine-zynqmp_dma-fix-race-condition-in-the-probe.patch